Adobe - http://www.adobe.com/education/instruction/adsc/ - Project ideas from Adobe. These projects are designed for the adobe suite of applications. They can be modified to be used with other applications as well. These projects cover all subject areas.
Coaster Creator is an interactive lesson about potential and kinetic energy. Coaster Creator provides a audio/ visual tutorial in which students learn about the physics behind roller coasters. After completing the tutorial, students can design and test their own roller coasters. If the roller coaster is designed improperly it will either crash or stall out.
Buying your first car -- In this project students will research all the aspects involved in purchasing a car.
Here is an example from a canadian social studies class. This project uses digital storytelling and design to create a final project that shows canadian history - http://www.galileo.org/initiatives/vmuseum-v1/. (photostory, audacity, adobe fireworks, voicethreads or blog to publish.
Project Resources
Adobe Projects
Standards Based Projects
Project Based Learning Resources
Sample Projects
Google Earth Lessons